Women look at tributes left at the Linwood Islamic Centre in Christchurch, New Zealand, following the March 15 massacre at two mosques.
William West/AFP/Getty Images
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J.M. Berger, who studies extremist movements, warns that white nationalism is a growing phenomenon worldwide — with many in the movement drawing inspiration from President Trump.
Women look at tributes left at the Linwood Islamic Centre in Christchurch, New Zealand, following the March 15 massacre at two mosques.
William West/AFP/Getty Images
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